John geoege soweeby



(No Model.)

J. G. SOWERBY. APPARATUS USED IN FIRE POLISHING GLASSWARB.

Patented Feb. 15, 1887.

wwwwwa 2 6m %Q N, FEYERs. mmlo-uuw m hor, Washingtun. nc,

V UNITED STATES PATENT OFFICE.

JOHN GEORGE SOXVERBY, OF GATESHEAD-ON-TYNE, COUNTY OF DURHAM, ENGLAND.

APPARATUS USED IN FIRE-POLISHING GLASSWARE.

SPECIFICATION forming part of Letters Patent No. 357,868, dated February 15, .1887.

Application filed December 1, 1886. Serial No. 220,409. (No model.) Patented in England May 6, 1886, No. 6,150, and in Belgium June 18, 1886, No. 73,532.

To aZZ whom: it may concern.-

Be itknown that I, JOHN GEORGE SowERBY, a subject of the Queen of England, residing at Gateshead-on-Tyne, in the county of Durham and Kingdom of England, have invented a new and useful Improvement in Apparatus Used in FirePolishing Glassware, (for which I have obtained Letters Patent for the Kingdom of Belgium under the No. 78,532, date of June 18, 1886, and am applying for Letters Patent in Great Britain, No. 6,150, bearing date May 6, 1886,) of which the following is a specification.

My invention relates to an improvement ap- .1 plied .to apparatus used to hold glassware while being fire polishedsucl1, for example, as the ordinary snap or spring-and it consists in covering the parts of such apparatus which come in contact with the glassware with asbestus, the objects of my improvement being that the apparatus may be worked cold without fear of cracking or breaking the glass, that it will enable the workman to hold articles of glassware--such as tumblers, &c. which it is impossible to hold with the ordinary snap or spring, and that it saves the extra cost of flattening-that is to say, polishingthe bottom of tumblers, there being no rough bottom to be flattened, as is the case 0 in tumblers made by the present method, that is stuck upon a post or punty.

The accompanying drawing is a sectional View of an ordinary snap or spring embodying my improvement.

A indicates the snap or spring; B, atumbler; O, pad or covering of asbestos fixed to clip D; E, pad on plate F.

The pads of asbestus, G E, form a cushion for the tumbler B, interposing between it and the metal of D and F, preventing its slipping, 0 as it does when resting against the metal asin ordinary snaps, and accomplishing the objects above specified.

I have not deemed it necessary to describe the construction and action of the snap, as it differs from those in ordinary use only by the addition of the pads or covering 0 E.

The dimensions of the asbestus coverings or pads, their number, and their shape will necessarily be dependent upon the formation of 5C the snap or spring, box, or other appliance used, and the size and shape of the article which it is to hold during the fire-polishing thereof.

I attach the asbestus coverings or pads to the snap or other analogous apparatus with copper wire, or in any convenient manner.

I do not claim, broadly, the interpositionof pads or coverings of any material between the article to be fire-polished and the metal of the 6c apparatus holding it; but

\Vhat I do claim as my invention, and desire to secure by Letters Patent, is-

In a snap or spring or analogous apparatus for holding glassware while being fire-polished, the combination of pads or coverings of asbestos with those parts of the apparatus which would otherwise come in contact with the'article to be fire-polished during the operation, suhstantiallyas described, for the pur- 7o poses specified.

JOHN GEORGE SQWERBY.

Witnesses:

JOHN WILLIAM S WERBY, JOHN GUTHRIE WRIGHT. 

